DESCRIPTION
The PD655 is a Large Display Process Meter with flow rate, totalizer, and
batch control capabilities. It accepts the
common process signals such as 4-20 mA,
0-5 VDC, 1-5 VDC, and 0-10 VDC. It displays these signals in engineering
units on a large, high efficiency, 4½ digit red LED display. The meter also
provides two isolated 24 VDC power supplies to drive both the input and output
loops. Options include up to 4 relays for alarms or batch controlling as well as
an isolated 4-20 mA transmitter output.
MOUNTING
Enclosure contains four holes for wall-mounting. Panel mounting and 2"
Pipe Mounting kits available.
SPECIFICATIONS
Except where noted all specifications apply to operation at +25°C.
INPUTS
Field selectable: 4-20 mA, 0-20 mA, 0-5 V, 1-5 V, 0-10 V
DISPLAY
Six digit, 1.0" (25.4 mm) high efficiency red LED, -19999(0) to
29,999(0) with selectable extra zero. Total: 0 to 999,999; automatic lead zero
blanking
DECIMAL POINT
Process/rate display: Decimal point may be placed in any of the following
positions: 2.9999, 29.999, 299.99, 2999.9, or 299990.
Total decimal point: 9.99999, 99.9999, 999.999, 9999.99, or 99999.9. Rate and
total decimal points are independent of each other.
CALIBRATION RANGE
4 mA (1 V) input may be set anywhere in range of the meter. 20 mA (5 V) may
be set anywhere in range of the meter above or below 4 mA input. An ERROR
message will appear if input 1 signal and input 2 signal are too close together.
e.g. Minimum span for an 11-point, 4-20 mA calibration is 0.16 mA between inputs.
ALARM POINTS
Four, any combination of high or low alarms
ALARM POINT DEADBAND
0-100% of full scale, user selectable
ALARM STATUS INDICATION
Front panel LED
PEAK HOLD (DISPLAY PEAK)
Captures the peak process/rate and displays it via the front panel ENTER
button.
PEAK HOLD INDICATION
Front panel flashing "R" LED
LOCKOUT
Jumper JP1 labeled "LOCK" restricts modification of calibration
values.
NON-VOLATILE MEMORY
All programming values are stored in non-volatile memory for a minimum of
ten years if power is lost.
NORMAL MODE REJECTION
64 dB at 50/60 Hz
POWER
AC power, 115 or 230 VAC (field select) ±10%, 50/60 Hz, 12 VA
DC Power, 22-28 VDC; 12 watts maximum
ENVIRONMENTAL
Operating temperature range: -20 to +65°C
Storage temperature range: -40 to +85°C
Relative humidity: 0 to 90% non-condensing
CONNECTIONS
Removable screw terminal blocks (provided), accept 22 to 12 AWG wire
RATE/TOTALIZER/BATCH CONTROLLER FEATURES
RATE DISPLAY INDICATION
LED labeled "R" in lower right illuminates when meter is displaying
rate or process input.
LOW-FLOW CUTOFF
Any input below the low-flow cutoff value will result in a display of zero.
May be set from 1 count to 100% F.S., user selectable. To disable low-flow
cutoff, program cutoff value to zero. Totalizer is based on rate display. So,
inputs below the low-flow cutoff value will not affect the totalizer.
ALTERNATING DISPLAY
Display may be programmed to alternate between rate and total every 10
seconds.
TIME BASE
Second, minute, hour, or day
TOTAL DISPLAY
0 to 999,999, automatic lead zero blanking
TOTAL DECIMAL POINT
May be set in any of the following positions: 9.99999, 99.9999, 999.999,
9999.99, 99999.9. Total decimal point is independent of process/rate decimal
point.
TOTAL CONVERSION FACTOR
Programmable from 0.00001 to 59999
TOTALIZER
Calculates total based on rate and field programmable multiplier to display
total in any engineering unit.
TOTALIZER ROLLOVER
Totalizer "rolls over" when display exceeds 999,999. Relay status
reflects display.
TOTALIZER PRESETS
Up to four, user selectable under Setup. Any set point can be assigned to
total and may be programmed anywhere in the range of the meter.
PRESET OFFSET
Relays assigned to total can be programmed to trip at any point below the
next relay’s preset value.
PROGRAMMABLE DELAY ON RELEASE
If the meter is programmed to reset total to zero automatically when the
highest preset is reached, then a delay will occur before the total relays
reset. This delay can be programmed anywhere from 1 to 999 seconds.
PRIORITY BATCH PROGRAMMING
This feature allows the user to quickly change preset values without going
into the main menu by holding the ENTER button for more than 3 seconds.
TOTAL RESET
Via front panel ENTER button, external contact closure, or
automatically via user selectable preset value.
TOTAL RESET LOCKOUT
Meter may be programmed so total can not be reset from front panel.
OPTIONS
Relays
RATING
2 or 4 SPDT (form C); rated 2 Amp @ 30 VDC or 2 Amp @ 250 VAC resistive load;
1/14 HP @ 125/250 VAC for inductive loads. Built-in suppression.
ASSIGN TO PROCESS/RATE OR TOTAL
Any relay may be assigned to process/rate or total.
BUILT-IN SUPPRESSION
A built-in suppressor (snubber) to prolong the life of the relays protects
each relay contact. The suppressor provides a degree of protection against
electrical noise caused by inductive loads. Suppressor value: .01 µF/470 ohm,
250 VAC.
DEADBAND
0-100% of full scale, user selectable
HIGH OR LOW ALARM
User may program any alarm for a high or low trip point.
RELAY OPERATION
Latching or non-latching
FAIL-SAFE OPERATION
Relay coils are energized in non-alarm condition. In case of power failure,
relays will go to alarm state. Fail-safe operation may be disabled, by removing
jumper J5 located on the Options PCB.
AUTO INITIALIZATION
When power is applied, relays assigned to total will reflect the state of
the accumulated total value in memory. Relays assigned to process/rate will
reflect the state of the input to the meter.
TOTAL RELAYS RESET
- When total is reset to zero, if set up for external total reset
- After delay has elapsed, if set up for internal total reset
- Manual any time, if set up for external total reset. Manual reset resets all manually resetable relays.
PROCESS/RATE RELAYS RESET
Relays assigned to process/rate may be programmed to reset in any of the
following ways:
- Automatic reset when the input passes the reset point.
- Manual reset at any time (via user supplied external contact closure at
terminals AK and CM or front panel ACK button.) Manual reset resets all
manually resetable relays.
- Automatic plus manual reset at any time. Relays will automatically reset
when input passes the reset point. Relays can also be manually reset at any
time (via user supplied external contact closure at terminals AK and CM or
front panel ACK button.) Manual reset resets all manually resetable relays.
- Manual reset only after alarm condition has been corrected. Relays can be
manually reset only after alarm condition has been corrected (via user
supplied external contact closure at terminals AK and CM or front panel ACK
button.) Manual reset resets all manually resetable relays.
ISOLATED 4-20 Ma TRANSMITTER OUTPUT
CALIBRATION RANGE
The transmitter output can be calibrated so that a 4 mA output is produced for
any process/rate measured by the meter. The 20 mA output may correspond to any
process/rate that is at least 501 counts greater or smaller than the
process/rate corresponding to 4 mA. (Ex. 4 mA = 0, 20 mA = 501) If the span
between 4 and 20 mA is less than 501 counts, an Error message will
appear.
EQUIPMENT NEEDED
The 4-20 mA output from the meter is calibrated without the use of a
calibrator.
OUTPUT LOOP-POWER
24 VDC ±5% @ 20 mA, regulated. Maximum loop resistance is 1200 ohms.
Isolated from input loop-power.
ACCURACY
±0.1% F.S., ±0.004 mA
ISOLATION
500 VDC or peak AC, input-to-output or input/output-to-power line
EXTERNAL LOOP-POWER SUPPLY
35 VDC maximum
OUTPUT LOOP RESISTANCE
